Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Ark7 - Choose a property and invest in shares
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Peerstreet - Finances real estate through a form of crowdfunding.
Better Uptime - We call you when your website goes down
Riley - A personal assistant for apartment hunting